LXR linux/arch/powerpc/include/asm/mman.h

   1/*
   2 * This program is free software; you can redistribute it and/or
   3 * modify it under the terms of the GNU General Public License
   4 * as published by the Free Software Foundation; either version
   5 * 2 of the License, or (at your option) any later version.
   6 */
   7#ifndef _ASM_POWERPC_MMAN_H
   8#define _ASM_POWERPC_MMAN_H
   9
  10#include <uapi/asm/mman.h>
  11
  12#ifdef CONFIG_PPC64
  13
  14#include <asm/cputable.h>
  15#include <linux/mm.h>
  16
  17/*
  18 * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
  19 * here.  How important is the optimization?
  20 */
  21static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
  22                unsigned long pkey)
  23{
  24        return (prot & PROT_SAO) ? VM_SAO : 0;
  25}
  26#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
  27
  28static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
  29{
  30        return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
  31}
  32#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
  33
  34static inline int arch_validate_prot(unsigned long prot)
  35{
  36        if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
  37                return 0;
  38        if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
  39                return 0;
  40        return 1;
  41}
  42#define arch_validate_prot(prot) arch_validate_prot(prot)
  43
  44#endif /* CONFIG_PPC64 */
  45#endif  /* _ASM_POWERPC_MMAN_H */
  46